Well-designed power stage
The regulated linear power of 1023B operates a high-power ring transformer isolated with an iron cover which significantly reduces vibration and noise. It is designed to support up to 300W, a comfortable room to return a deep dynamic without causing additional distortion. The circuit is designed so that the voltage and current are completely independent.
With two consecutive 30A bridges and a set of capacitors ELNA 40,000 uF, the power stage features an excellent stability, which allows to significantly improve the signal / noise ratio (105dB).
An LM317 regulator maintains a stable voltage to a level that is ideal for complementary power transistors (NJW0281 / NJW0302), preserving the excellent linearity of the gain.
The power goes through a Omron power relay to prevent unwanted noises during power up.